Thank you for feedback !
I would like to know if for recovery in time  of db I need this files beside the log/transactions log  file?
Do I have to force  to flush the trans to disk  before running db2bak.pl script?
I assume  the output of  db2bak.pl new directory c  will re-store the whole DS  , will this be the best option for disaster recovery ? ( better than export /db2ldif.?)
Isabella